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Question:

Cat with urinary issues- switch from hills CD to Royal canin SO

I'm really hoping for some advice here because I'm at my wit's end. My 5-year-old cat, Whiskers, has been having recurring urinary issues for a while now. We've been using Hill's Prescription Diet c/d as recommended by our vet and it seemed to help for a bit, but the issues are back and I can tell Whiskers is uncomfortable. He’s been having accidents outside the litter box and seems to be straining when he tries to go. It's breaking my heart to see him in pain, and I’m so worried about his health. A friend suggested switching to Royal Canin SO, but I’m hesitant because I don't want to make things worse. Have any of you made this switch before, and did it help? Any advice on transitioning between the two or other tips for managing urinary health would be so appreciated. Whiskers is like family to me, and I just want to do what's best for him. Thanks a ton in advance!

Answer:

Hello there,



I'm sorry to hear your kitty is experiencing urinary issues. Both Hill's c/d and Royal Canin SO are specially formulated diets to address urinary problems in cats. These diets work by altering the urine pH and reducing the formation of crystals and stones, which can cause discomfort and potential blockages. The choice between the two often depends on what's more effective for your cat, but sometimes trying the other brand may lead to improvement.



At home, ensure your cat stays hydrated, as water intake helps dilute the urine and mitigate urinary tract issues. Consider using a water fountain to encourage more drinking. Also, keep their litter box clean and in a quiet area to alleviate any stress-related urinary symptoms.



Watch for signs of a serious issue, like straining to urinate, blood in the urine, frequent trips to the litter box with little output, or behavioral changes such as hiding or increased vocalizations. These could signal a blockage, which is a medical emergency warranting immediate veterinary care.



If you notice any of these signs or if the diet change doesn’t seem to help, please consider booking a video consult with one of our vets on Dial A Vet. We can tailor advice and decide on the best course of action to help your cat feel better soon.

Answered by

Louise - Senior Veterinary Nurse, Dial A Vet

June 20, 2025

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The "Ask a Vet" forum on Dial A Vet offers general information and helpful tips on pet health, but it's not a substitute for professional veterinary care. The advice here doesn't create a veterinarian-client-patient relationship, and our vets can't diagnose or treat your pet remotely. For emergencies or specific medical concerns, always contact your local veterinarian immediately. Your pet's health is unique, and decisions should only be made after consulting with a qualified professional. By using this forum, you acknowledge these limitations and agree to seek in-person veterinary advice for all your pet's health needs. View our content guidelines.
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